encode · decode · decompose

Dusk Codec

Base64 & Base64URL conversion, plus a JWT decomposer — read under the last light of the sky.

Input

Output

JWT compact token

This decodes the header and payload and shows the raw signature bytes — it does not verify the signature. Verifying an HMAC or RSA/EC signature requires the secret or public key, which this tool never asks for or sends anywhere; everything here runs locally in your browser.